Extreme caution around power lines should be exercised in the following situations:

• When working or operating machinery near overhead power lines, always maintain a safe distance as per regulations, use a spotter to help maintain this distance, and avoid sudden movements that might bring equipment close to the lines.

• When performing activities such as cutting trees or vegetation near power lines, consult utility company representatives beforehand to learn how to do it safely without contact.

• When using ladders, cranes, or any metal objects near power lines, always check for their presence and maintain at least a 10-foot clearance to prevent accidental contact.

• When a downed power line is observed, do not touch it and immediately call emergency services or utility companies.

• While working near power lines, conduct a hazard assessment, know the location of all power lines, and follow safe work procedures especially when working within the minimum safe distance which varies by voltage level (for example, 3 meters for lines up to 150,000 volts).

• During extreme weather conditions, especially with lightning, suspend maintenance or work near power lines to avoid danger.

• When digging near buried utilities, exercise extreme caution and consider having a spotter present to observe excavation.

In general, extreme caution is necessary any time you are near power lines, whether working around them, operating equipment nearby, or managing activities like tree trimming or digging. Always assume power lines are live and dangerous, respect all signs and barriers, and follow safety recommendations to prevent accidents or fatalities.